Note 13 - Related Parties - Loans Outstanding to Directors and Executive Officers (Details) - Directors and Executive Officers [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Beginning balance	$ 14,473,000	$ 8,882,000
New loans	13,013,000	6,374,000
Repayments	(1,770,000)	(783,000)
Ending balance	$ 25,716,000	$ 14,473,000